* for me, personally, stormhorns chain is still great fun despite many many many reruns.
* wheloon quest arc not quite as much but I still rerun for sagas without it feeling grindish/boring.
*having both expansions offers full estar sagas to a vip already having access to highroad and druids deep. (since OP has missed out on anniversary card event, +3skill tomes from epic sagas are of interest)
* stormhorns explorer is arguably the most beautifully done slayer area graphically and size wise.
* a lot of the standard quest npc reward items are highly interesting to the OP as a returning player looking to catch up on lootgrind to cap efficiently.
* the named items dropping in quest are also partially very nice, though admittedly somewhat devalued by epic necro4 gear
* the wondrous craftsmanship lootgen in chain rewards can be nice (though on epics, as above, pretty much devalued due to necro4 - still occasionally nice heroic twink gear though)
*added diversity of available quests in the lvl15-19 range due to heroic versions of quest chains
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* admittedly the wheloon purple haze graphics effect is annoying still, even when tweaked down as much as possible in gfx settings